flint



(Model.) v

D. H. FLINT.

LOCK. No. 245,472. Patented Aug. 9,1881.

UNTTED S TaTas PATENT @rrrsa DANA H. FLINT, or HOPKINTON, ASSIGNOR or ONE-HALF T0 ALMON H. FLINT, on MOIRA, NEW YORK.

LOCK.

SPECIFICATION forming part of Letters Patent No. 245,472, dated August 9, 1881.

Application filed June 21, 1881.

T 0 all whom it may concern Be it known that I, DANA H. FLINT, a citizen of the United States, residing at Hopkinton, in the county of St. Lawrence and State of New York, have invented certain new and useful Improvements in Door Locks and Keys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has for its object to furnish an improved lock for doors and other devices; and it consists, primarily, of a pair of pivoted dogs operated automatically by a gravity ball or weight arranged in combination with the sliding bolt; and it consists, further, in an improved key for lockingand unlocking the device, all of which will be hereinafter fully explained.

In the drawings, Figure 1 is a plan of my improvements, the side of the casing being removed. Fig. 2 is the bolt. Fig. 3 shows the pivoted jaws in detail, together with the gravity-ball; and Fig. 4 shows the improved key.

a is the casin g in which the several parts of my invention are arranged. WVithin the casing I place the bell to and the hammer (H. The wire or rod a which carries the hammer, is bent near its middle, so that it presents an e1- bow, a near to the rear end of sliding bolt 1). As the bolt is thrown back in unlocking the door it engages and throws back the elbow of the bell-rod and rings the bell.

b is the sliding bolt, which has its inner end bifurcated, so as to provide the parallel arms b b, and it has the cross-slot 1) arranged to be in line with the key-hole a in the casing a. It has on one side the stops or shoulders b N, and on its otherside, and at the rear end, a beveled shoulder or cam-surface, I), which lifts the elbow of the bell-rod and permits the bolt to be thrown out in the act of lockin g the door without ringing the bell. Theinner endof the bolt is held by a guide pin, b placed in a cross guide-slot, 1), formed therein. Other means than the guide-pin b may be employed to give wings c apart.

,most touch each other.

(Model.)

steadiness and firmness to the inner end of the bolt; but I prefer to employ the pin, as shown.

00 are two dogs employed to lock the bolt I) when thrown out or in. They are pivoted at their inner angles, 0 to the casing, just opposite the key-hole, and so that the bolt 1) will slide between them and said key hole, as shown. Each dog is constructed with a vertical wing, c", and a horizontal wing, c. On the outer end of the horizontal wing there is formed the vertical lug or stop 0 and on the pivotal end there is formed a cam, 0 In the face of the vertical wing 0 there is formed a concave recess, 0 \Vhen the faces of the two dogs are brought together, as shownin Fig.1, an oval-shaped recess is provided, in which is placed the ball or weight d. The ball (1 slides vertically in the said recess and forces the WVhen the ball is at the middle of said chamber or recess the two faces of the wings a 0 may be pressed toward and al- VVhen the ball is at either end of the chamber it forces the wings apart. The horizontal wing is divided into two parts or arms, as shown at c, Fig. 3, in order to reduce its weight below the weight of the vertical arm 0 and as a matter of economy in material.

When the parts are arranged as shown in Fig. 1, in which the bolt is thrown out and fastened by the stop or end 0 resting behind the shoulder I), if the key be inserted and turned it will strike the cam 0 which lies partially across the slot b and will cause the dog to turn on its pivot, the ball (I will be forced into the middle of the oval chamber and the stop 0 will be lifted from its place behind the shoulder b, and the bolt will be engaged by the bit of the key in recess b, and will be readily thrown back into the casing, where it will be locked by the end or stop 0 on the other dog dropping behind the catch b As soon as the key clears the cam c and the bolt the ball (I drops to the end of the oval chamher and locks the bolt. When the bolt is bein g slipped back into the casing the end of the arm 1) comes in contact with and pushes back the elbow a of the bell-sprin g. A cam or inclined surface, of, is arranged to push the elbow sidewise till the latter will slip over the top of the cam b and drop suddenly, thus giving the necessary movement to ring the hell.

0 is the key, composed of a shell or tube, 6, having its outer end, 6 closed. It is provided withaside longitudinal slot, 6 and with a camsurface, 0 extending from the outer end of the slot 0 across to the opposite side of the tube or shell.

0 is the sliding shaft which is placed in the tube 0, and it is provided with suitable stops to limit the extent of its movement and to make it fast to the shell or tube, so that the latter can be readily turned by it.

On the end of shaft 0"", within the shell 0, I pivot the head-plate or ward-lifter e, which may be drawn in a straight line with the shaft 0", or it will turn outward at right angles therewith. WVhen arranged in the tube, if the shaft be pushed into the tube, the end of the headplate strikes against the cam c and is turned outward into the position shown in the first part of Fig. 4. If the shaft be drawn out, the head-plate is drawn in line with the shaft and into the tube, out of the way.

The key-hole a is made round and admits the end of the round key 0. After the key has been thrust into the lock the shaft is pushed inward and the plate 0 is made to turn out into proper position to lock or unlock the device.

Having thus described my invention, what I claim, and desire to secure by Letters Patent is- 1: The combination, with the bolt b, provided with shoulders 11 I), of the dogs cc, constructed with cams a, and horizontal wings c, with lugs 0 and vertical wings 0 with concave recesses 0 said dogs being pivoted with the concave recesses together, and ball or weight (1, placed in the chamber formed by the concave surfaces in the proximate faces of the dogs, substantially as set forth.

2. The combination, substantially as hereinbefore set forth, of the shell or tube 0, having its outer end closed, and provided with a camsurface, 6, and longitudinal side slot, 6, the shaft 0 placed and sliding within the tube 6, and the bit 0 pivoted to the end of shaft 0 within the tube 0, whereby it may be thrust against the cam surface 0 and turned out through the slot 0 substantially as set forth.

In testimony whereof I aifix my signature in presence of two witnesses.

DANA H. FLINT.

Witnesses L. P. FERRIS, L. P. FARRINGTON. 

